1. Theoretical Question 1 Theoretical Competition
35th International Physics Olympiad
Pohang, Korea
15 ~ 23 July 2004
Theoretical Question 1
Theoretical Competition
Saturday, 17 July 2004

2. Theoretical Question 1: “Ping-Pong Resistor”
Objective: To find current through the capacitor plates d V R

3. Theoretical Question 1: “Ping-Pong Resistor”
Problem design: d V R mg t r d q +V
side view
Q=CV
F=qE - mg

4. I-V Curves

5. Theoretical Question 1: “Ping-Pong Resistor”
Physical concepts required:
Electrostatics
Electric Field, Potential
Gauss’ Law
Current
Mechanics
Energy Conservation
Collisions
Kinematics V R d